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kconfig: Use more collision resistant temporary filenames 

kconfig creates reasonably safe filenames for its temporary files
except for two of them.

Change-Id: I6861f55ae2a5311e3fb7919333ce9af1e39ce78b
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/408
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2011-11-05 14:39:56 +01:00 committed by Stefan Reinauer
parent 3db85f3c1b
commit f285e04125
1 changed files with 7 additions and 4 deletions
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11
util/kconfig/confdata.c
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@ -682,6 +682,7 @@ int conf_write_autoconf(void)
FILE *out, *out_h;
time_t now;
int i, l;
char tmpname[128], tmpname_h[128];
sym_clear_all_valid();
@ -692,11 +693,13 @@ int conf_write_autoconf(void)
return 1;
#endif
out = fopen(".tmpconfig", "w");
sprintf(tmpname, ".tmpconfig.%d", (int)getpid());
out = fopen(tmpname, "w");
if (!out)
return 1;
out_h = fopen(".tmpconfig.h", "w");
sprintf(tmpname_h, ".tmpconfig.h.%d", (int)getpid());
out_h = fopen(tmpname_h, "w");
if (!out_h) {
fclose(out);
return 1;
@ -791,7 +794,7 @@ int conf_write_autoconf(void)
if (!name)
name = "include/linux/autoconf.h";
UNLINK_IF_NECESSARY(name);
if (rename(".tmpconfig.h", name))
if (rename(tmpname_h, name))
return 1;
name = getenv("KCONFIG_AUTOCONFIG");
if (!name)
@ -801,7 +804,7 @@ int conf_write_autoconf(void)
* and this marks the successful completion of the previous steps.
*/
UNLINK_IF_NECESSARY(name);
if (rename(".tmpconfig", name))
if (rename(tmpname, name))
return 1;
return 0;